/**
 * Assignment part 1
 * 
 * @author Color Lee
 * 			
 */
public class asgQ1 implements asgADT{
	
	/**
	 * Command Execute
	 */
	public void execute(){
		String ans = io.showQuestionString("Input the postfix expression: ");
		evaluator.build(ans);
		System.out.println("\nExpression tree:\n" + evaluator.getTree());
	}	
	
}
